Again, the answer to this question varies from company to company. And again, testing is the way to find out what works best. Typically, weekends and mornings seem to be times when multiple emails are opened, but since your audience may have different habits, it's best to experiment and then use your data to decide.
2021 年—2025 年，中国企业科创力数据库去重后的入库企业数量从5848 家增至7056 家，增加了1208 家，五年增长了两成（20.66%）。同期，披露研发投入的企业从4412 家增至5915 家，增加了1503 家，五年增长三成多（34.07%）；披露研发人员的企业从3895 家增至5309 家，增加了1414家，也增长了三成多（36.30%）。
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Inside the stamp, the entire surface is filled with monochrome dark illustrations etched into the background like fine engraving. The illustrations must depict 5–8 of the most universally iconic and recognizable objects, characters, vehicles, symbols, and locations from [MOVIE] — chosen specifically because anyone who has seen the film would instantly recognize them. All arranged loosely across the full width of the stamp with generous spacing. Detailed technical engraving style — only outlines and fine internal linework, no fills, high contrast against the background.
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